EP3050980B1 - Procédé de traitement thermique de restauration pour élément métallique résistant à la chaleur endommagé par fluage - Google Patents

Procédé de traitement thermique de restauration pour élément métallique résistant à la chaleur endommagé par fluage Download PDF

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Publication number
EP3050980B1
EP3050980B1 EP13894412.9A EP13894412A EP3050980B1 EP 3050980 B1 EP3050980 B1 EP 3050980B1 EP 13894412 A EP13894412 A EP 13894412A EP 3050980 B1 EP3050980 B1 EP 3050980B1
Authority
EP
European Patent Office
Prior art keywords
heat
resistant metal
metal member
resistant
creep
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP13894412.9A
Other languages
German (de)
English (en)
Other versions
EP3050980A4 (fr
EP3050980A1 (fr
Inventor
Hidetaka Nishida
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Chugoku Electric Power Co Inc
Original Assignee
Chugoku Electric Power Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Chugoku Electric Power Co Inc filed Critical Chugoku Electric Power Co Inc
Publication of EP3050980A1 publication Critical patent/EP3050980A1/fr
Publication of EP3050980A4 publication Critical patent/EP3050980A4/fr
Application granted granted Critical
Publication of EP3050980B1 publication Critical patent/EP3050980B1/fr
Not-in-force legal-status Critical Current
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C21D9/085—Cooling or quenching
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
    • B23P6/00—Restoring or reconditioning objects
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/34—Methods of heating
    • C21D1/42—Induction heating
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
    • C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
    • C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D6/00—Heat treatment of ferrous alloys
    • C21D6/004—Heat treatment of ferrous alloys containing Cr and Ni
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
    • C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
    • C21D9/50—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for welded joints
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the present invention relates to a regenerative heat treatment method for a heat-resistant metal member suffering from creep damage.
  • An object of the present invention is to provide a method capable of restricting thermal expansion in a direction toward an outer periphery of a member occurring when a heat-resistant metal member suffering from creep damage is heated, and capable of performing efficient regenerative heat treatment on the heat-resistant metal member suffering from creep damage.
  • a regenerative heat treatment method for a heat-resistant metal member suffering from creep damage includes the configuration defined in appended claim 1.
  • the present invention enables provision of a method capable of restricting thermal expansion in a direction toward an outer periphery of a heat-resistant metal member suffering from creep damage occurring when the member is heated, and capable of performing efficient regenerative heat treatment on the heat-resistant metal member suffering from creep damage.
  • Fig. 1 is a schematic diagram illustrating a regenerative heat treatment method for a heat-resistant metal member suffering from creep damage, to explain an embodiment of the present invention.
  • Fig. 2 is a schematic cross-section illustrating a cross-section of Fig. 1 to explain an embodiment of the present invention.
  • a high temperature pipe which has been manufactured using a heat-resistant metal material and damaged by creep with use, serves as a heat-resistant metal member 10; however, there is no limitation thereto.
  • the heat-resistant metal member 10 may be another high temperature member, such as a turbine, which has been manufactured using a heat-resistant metal material and damaged by creep with use.
  • the heat-resistant metal member 10 (including a weld 20 therein; similar applies below), which has been manufactured using a heat-resistant metal material and damaged by creep with use, is covered by a heat-resistant covering member 30 so as to contact the outer periphery of the heat-resistant metal member 10, and the heat-resistant covering member 30 is secured.
  • the heat-resistant metal member 10 covered by the heat-resistant covering member 30 is then heated for a specific duration at a temperature of 1000°C or greater using a heater 40.
  • Covering and securing the heat-resistant metal member 10 suffering from creep damage, by the heat-resistant covering member 30, and heating to a temperature of 1000°C or greater, as described above, enables compressive force to act on the heat-resistant metal member 10 undergoing thermal expansion in a direction toward the outer periphery, and enables efficient regenerative heat treatment to be performed on the heat-resistant metal member suffering from creep damage, while restraining thermal expansion in the direction toward the outer periphery of the heat-resistant metal member 10.
  • any creep voids or cracks are efficiently repaired using the force from thermal expansion toward the outer periphery of the heat-resistant metal member 10 and the structure of the heat-resistant metal member 10 is returned to a new material state (for example, an austenitic structure), thus enabling the lifespan of the heat-resistant metal member 10 to be extended.
  • a new material state for example, an austenitic structure
  • etching treatment or shot peening and etching treatment, may be performed on the section to be covered by the heat-resistant covering member 30 prior to covering the heat-resistant metal member 10 by the heat-resistant covering member 30 and securing.
  • Such processing enables work hardening of the surface layer of the heat-resistant metal member 10 to be performed by plastic deformation, enables residual compressive stress to be imparted to the surface of the heat-resistant metal member 10, and enables any oxidized film on the surface of the heat-resistant metal member 10 to be removed.
  • processing to remove (reduce) residual stress may be performed after the heat-resistant metal member 10 covered by the heat-resistant covering member 30 has been heated to a temperature of 1000°C or greater using the heater 40. More specifically, after the heat-resistant metal member 10 covered by the heat-resistant covering member 30 has been heated to a temperature of 1000°C or greater using the heater 40, the heat-resistant metal member 10 maybe first cooled to room temperature, then reheated to a temperature of an A 1 transformation point or greater (preferably from 10°C to 100°C above 1000°C) for a specific duration (for example, from approximately several hours to approximately 24 hours).
  • the heat-resistant metal member 10 in order to restrict thermal expansion toward the outside in the length direction of the heat-resistant metal member 10 (in directions toward the ends of the heat-resistant metal member 10) occurring when a creep degraded section of the heat-resistant metal member 10 is covered by the heat-resistant covering member 30 and heated by the heater 40, the heat-resistant metal member 10 may be secured in sections not being heated by the heater 40, by, for example, two clamps so as to sandwich the section being heated by the heater 40. This thereby enables any creep voids, cracks, or the like to be efficiently repaired.
  • Examples of the heat-resistant metal of the member 10 include 0.3Mo steel, 0.5Mo steel, 0.5Cr-0.5Mo steel, 1Cr-0.2Mo steel, 1Cr-0.5Mo steel, 1.25Cr-0.5Mo steel, 2.25Cr-1Mo steel, 5Cr-0.5Mo steel, 7Cr-0.5Mo steel, 9Cr-1Mo steel, 0.3Cr-Mo-V steel, 0.5Cr-Mo-V steel, 9Cr-Mo-V steel, 12Cr-Mo-V steel, 1Cr-1.25Mo-0.25V steel, 9Cr-1Mo-W steel, SUS304, SUS304L, SUS316, SUS316L, SUS316TI, SUS317, SUS321, SUS347H, SUS310S, Super304, SUS904L, NCF600, NCF601, NCF800, and NCF800H; however, there is no limitation thereto. Any known material used for members employed in thermal or nuclear power
  • the heat-resistant covering member 30 there are no particular limitations to the heat-resistant covering member 30, as long as it is capable of covering the heat-resistant metal member 10 so as to make contact with the outer periphery of the heat-resistant metal member 10 suffering from creep damage, as long as it is made from a heat-resistant material that restrains thermal expansion in the direction toward the outer periphery of the heat-resistant metal member 10 occurring when heated to the heating temperature mentioned above, and is able to maintain the approximate profile of the heat-resistant metal member 10.
  • a material having a lower thermal expansion coefficient than the heat-resistant metal member 10 at temperatures of the heating temperature mentioned above or greater is employed for the heat-resistant covering member 30.
  • the heat-resistant covering member 30 is configured from a heat-resistant material different from that of the heat-resistant metal member 10, yet having a thermal expansion coefficient of about the same as the heat-resistant metal member 10, or from a heat resistant material having a higher thermal expansion coefficient than the heat-resistant metal member 10, in order to restrain the thermal expansion of the heat-resistant covering member 30 occurring when heated to the heating temperature mentioned above, the outer periphery of the heat-resistant covering member 30 may be secured by a member of a heat-resistant material having a lower thermal expansion coefficient than the heat-resistant metal member 10 at or above the heating temperature mentioned above, so as to maintain the profile of the heat-resistant covering member 30.
  • heat-resistant material of the heat-resistant covering member 30 examples include ceramics such as alumina, zirconia, aluminum nitride, silicon carbide, silicon nitride, cordierite, sialon, zircon, and mullite, and alloys such as Alloy 903, Alloy 909, and HRA 929.
  • the form of the heat-resistant covering member 30 is, for example, of a cord, plate, or clamp form. Securing of the above may be accomplished by, for example, wrapping a cord-shaped or plate-shaped heat-resistant covering member 30 around the outer periphery of the heat-resistant metal member 10 suffering from creep damage, by attaching a clamp-shaped heat-resistant covering member 30 to the outer periphery of the heat-resistant metal member 10 suffering from creep damage, or by attaching a heat-resistant covering member 30 formed in a plate shape or the like to the outer periphery of a heat-resistant metal member suffering from creep damage using fasteners, such as clamps or screws.
  • the heat-resistant covering member 30 is made from fittings including two substantially semi-circular arc cross-section shapes.
  • the heat-resistant covering member 30 is then secured to the surface of the heat-resistant metal member 10 using threaded members 35 attached to flanges of these fittings, such that the inner face of the fittings contact the outer periphery of the heat-resistant metal member 10 suffering from creep damage.
  • the threaded members 35 are manufactured, for example, from the same material as the heat-resistant covering member 30.
  • the heating temperature of the heat-resistant metal member 10 covered by the heat-resistant covering member 30 is not particularly limited, as long as it is a temperature of 1000°C or greater.
  • the heat-resistant metal member 10 is heated to a temperature of, or greater than, an A 3 transformation point of the component of the heat-resistant metal of the member 10 having the highest A 3 transformation point (preferably from 10°C to 100°C above 1000°C) for a specific duration (for example, from approximately several hours to approximately 24 hours) .
  • the high frequency heater 40 with capability to heat the heat-resistant metal member 10 covered by the heat-resistant covering member 30 from the outer periphery is employed, there is no particular limitation thereto, as long as a heating device capable of heating the heat-resistant metal member 10 at a section covered by the heat-resistant covering member 30 is employed.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Heat Treatment Of Articles (AREA)
  • Heat Treatments In General, Especially Conveying And Cooling (AREA)

Claims (3)

  1. Procédé de traitement thermique régénératif pour un élément métallique résistant à la chaleur (10) endommagé par fluage, ledit procédé comprenant :
    le revêtement de l'élément métallique résistant à la chaleur (10) par un élément de revêtement résistant à la chaleur (30) ayant un coefficient de dilatation thermique inférieur à celui de l'élément métallique résistant à la chaleur (10) et la fixation de celui-ci de manière à être en contact avec une périphérie externe de l'élément métallique résistant à la chaleur ; et
    le chauffage de l'élément métallique résistant à la chaleur (10) revêtu de l'élément de revêtement résistant à la chaleur (30) à une température supérieure ou égale à 1000°C, à l'aide d'un appareil de chauffage, à partir d'une périphérie externe de l'élément de revêtement résistant à la chaleur (30),
    dans lequel le dispositif de chauffage est capable de chauffer l'élément métallique résistant à la chaleur (10) au niveau d'une section revêtue de l'élément de revêtement résistant à la chaleur (30), et
    dans lequel le dispositif de chauffage est un dispositif de chauffage à haute fréquence (40).
  2. Procédé selon la revendication 1, dans lequel
    l'élément métallique résistant à la chaleur (10) est un élément en acier, et
    après le chauffage de l'élément métallique résistant à la chaleur (10) revêtu de l'élément de revêtement résistant à la chaleur (30) à une température supérieure ou égale à 1000°C, l'élément métallique résistant à la chaleur (10) revêtu de l'élément de revêtement résistant à la chaleur (30) est refroidi, puis chauffé à nouveau jusqu'à une température d'un point de transformation A1, voire supérieure.
  3. Procédé selon la revendication 2, dans lequel l'élément métallique résistant à la chaleur (10) revêtu de l'élément de revêtement résistant à la chaleur (30) est tout d'abord refroidi à la température ambiante, puis est chauffé à nouveau jusqu'à une température comprise entre 1010°C et 1100°C.
EP13894412.9A 2013-09-25 2013-09-25 Procédé de traitement thermique de restauration pour élément métallique résistant à la chaleur endommagé par fluage Not-in-force EP3050980B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2013/075925 WO2015045036A1 (fr) 2013-09-25 2013-09-25 Procédé de traitement thermique de restauration pour élément métallique résistant à la chaleur endommagé par fluage

Publications (3)

Publication Number Publication Date
EP3050980A1 EP3050980A1 (fr) 2016-08-03
EP3050980A4 EP3050980A4 (fr) 2016-09-14
EP3050980B1 true EP3050980B1 (fr) 2018-11-14

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EP13894412.9A Not-in-force EP3050980B1 (fr) 2013-09-25 2013-09-25 Procédé de traitement thermique de restauration pour élément métallique résistant à la chaleur endommagé par fluage

Country Status (7)

Country Link
US (1) US20160230242A1 (fr)
EP (1) EP3050980B1 (fr)
JP (1) JP5782210B1 (fr)
KR (1) KR20160042018A (fr)
CN (1) CN105555977A (fr)
CA (1) CA2924623A1 (fr)
WO (1) WO2015045036A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6809918B2 (ja) * 2017-01-31 2021-01-06 三菱重工業株式会社 金属成形品の熱処理方法及び製造方法
US10508316B2 (en) * 2017-03-31 2019-12-17 General Electric Company Method and fixture for counteracting tensile stress
JP7057505B2 (ja) 2018-08-29 2022-04-20 日本電信電話株式会社 修復装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6328825A (ja) * 1986-07-21 1988-02-06 Ishikawajima Harima Heavy Ind Co Ltd 金属管の残留応力改善方法
JPH0688120A (ja) * 1992-09-04 1994-03-29 Mitsubishi Heavy Ind Ltd ビーム加熱組織再生方法
JP4176412B2 (ja) * 2001-12-27 2008-11-05 三菱重工業株式会社 クリープ劣化部を再生する方法及び装置
JP4969221B2 (ja) * 2006-11-28 2012-07-04 三菱重工業株式会社 劣化部の再生方法、劣化部の再生装置
JP2010236006A (ja) * 2009-03-31 2010-10-21 Sumitomo Kinzoku Technol Kk 金属部材の再生熱処理方法
JP5859305B2 (ja) * 2011-12-27 2016-02-10 三菱重工業株式会社 大口径の金属管のクリープ部の再生装置及び該再生装置を用いた再生方法

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
CN105555977A (zh) 2016-05-04
JP5782210B1 (ja) 2015-09-24
CA2924623A1 (fr) 2015-04-02
EP3050980A4 (fr) 2016-09-14
US20160230242A1 (en) 2016-08-11
WO2015045036A1 (fr) 2015-04-02
JPWO2015045036A1 (ja) 2017-03-02
EP3050980A1 (fr) 2016-08-03
KR20160042018A (ko) 2016-04-18

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